We Repair and Sell ArSilicii (pronounced something like AR SIL E CHEE) AL110, AL120, AL310, AL320, AL-BK20 and AL-C20  chargers.

We keep a stock of most units, but as recognised distributors we are able to obtain any ArSilicii new unit within 9 days. We also have a stock of remanufactured items.


"Hello Allan, once again thanks for everything you have done. It is great that the pump now works off its proper switch and I can now see the fresh water tank levels when filling up. 
Having a working mains  charger and all the other things you fixed has transformed the vehicle. 
Its been a real pleasure working with you. 
Yours Thankfully Tom".

The Arsilicii units need care and consideration like any complex Electronic apparatus. No charger will take kindly to an exceptional workload caused from charging a battery past it's best, the primary reason why so many chargers fail. 

If you have a battery bank larger than that recommended by the manufacturer, both the Battery bank and the Charger life will be shortened for two reasons.

The first is because the AL110 and AL310 (both low power 10amp mains 230v chargers) will support a habitation battery bank no greater than about 90Ah. Remember that the units like the AL320 charges BOTH the Habitation battery and the Starter Battery so it already has a combined battery bank of around 180Ah. Adding a second big habitation battery will often result in the batteries not getting up to full charge once the batteries have aged. 

Secondly the unit controls all charge to the habitation battery whether from Solar (inbuilt Solar reg), Alternator or mains charger. If a second, big, battery is fitted this doubles the current through the unit from the Alternator, which the Spade connector type of plugs struggle to handle, resulting in a burnt front board. 

See the photo below showing a badly burnt White Habitation battery connector and Red Starter battery connector just starting to fail. This unit only had a single habitation battery fitted, but the battery was in a bad way.

Two big 100Ah batteries + the Fridge 12v power can draw upto 50amps from the Alternator, all of which goes in through the bottom left Red socket. 

This current is then split, the Fridge 12amps going out the Green Socket to the Fridge and the Habitation charge going out through the habitation White socket.


Excess current may also be passed through the unit if the Habitation battery is allowed to become poor, as the Alternator can be working harder for longer, so again over powering the front connectors.

The later 20amp units have uprated RAST5 front connectors which will take a little more current, but the practical restriction is still no more than a 160Ah TOTAL battery bank, which remember includes the Starter battery which it also looks after. We would suggest a habitation battery bank of 140Ah is the practical limit for the later chargers.

The AL120 restrictions are as per the AL 320.

In addition to a larger charger, the 20amp versions (AL 120, AL 320) have new stronger connectors that will pass more current. 

If you upgrade from an old unit to a late unit, the connector plugs will also require upgrading, but these should be supplied with the new unit. 

Where old AL310/AL320's are remanufactured, the sockets may be upgraded to the later stronger style, but again plugs will be supplied with the replacement unit. 


The AL 310/AL320 all have an inbuilt Solar regulator that will handle a 100watt Solar Panel. Just plug the Panel cabling into the centre front 2 pin connector. MAKE SURE THE POLARITY IS CORRECT OR YOU WILL DESTROY THE UNIT. The polarity is marked on the front of the Arsilicii box.


Arcillisi were asked their view on long term battery charging, here is the reply from ArSilicii Technical :

"If you have the motorhome parked, we suggest to not connect the 220V continuously".

Just connect it to the mains supply once a month for about 2 - 3 days. See our "EHU Full Time - Yes or No" page for the reasons why.

Whatever the failure, we have the solution. Click here to see our full stock list.


For more information on how to contact us use the Contact Us page.




Pictures and Guidance on the various Arsilicii systems : 

Arsilicii AL120 operation and wiring notes.pdf Arsilicii AL120 operation and wiring notes.pdf
Size : 161.954 Kb
Type : pdf
Arsilicii AL320 architecture instructions.pdf Arsilicii AL320 architecture instructions.pdf
Size : 872.27 Kb
Type : pdf

A Arsillici V3 Fuse Board.